mx: pool.ntp.org.
ns: a.ntpns.org.
ns: b.ntpns.org.
ns: c.ntpns.org.
ns: d.ntpns.org.
ns: e.ntpns.org.
ns: f.ntpns.org.
ns: g.ntpns.org.
ns: h.ntpns.org.
ns: i.ntpns.org.
ns: pool.ntp.org.